diff --git a/cmd/demo/config.yml b/cmd/demo/config.yml
index cc59a99..bdd8aef 100644
--- a/cmd/demo/config.yml
+++ b/cmd/demo/config.yml
@@ -1,6 +1,8 @@
 ---
 targets:
   demo:
+    services:
+      - Service
     package: github.com/foomo/gotsrpc/demo
     out: /tmp/test.ts 
 mappings:
diff --git a/cmd/gotsrpc/gotsrpc.go b/cmd/gotsrpc/gotsrpc.go
index 3ec5f41..0355cad 100644
--- a/cmd/gotsrpc/gotsrpc.go
+++ b/cmd/gotsrpc/gotsrpc.go
@@ -4,7 +4,11 @@ import (
 	"encoding/json"
 	"flag"
 	"fmt"
+	"go/format"
+	"io/ioutil"
 	"os"
+	"path"
+	"strings"
 
 	"github.com/foomo/gotsrpc"
 	"github.com/foomo/gotsrpc/config"
@@ -60,8 +64,9 @@ func main() {
 	}
 	fmt.Println(os.Stderr, buildTargets)
 
-	/*
-		longPackageName := args[0]
+	for name, target := range buildTargets {
+		fmt.Println(os.Stderr, "building target", name)
+		longPackageName := target.Package
 		longPackageNameParts := strings.Split(longPackageName, "/")
 		goFilename := path.Join(goPath, "src", longPackageName, "gotsrpc.go")
 
@@ -72,20 +77,19 @@ func main() {
 		}
 
 		packageName := longPackageNameParts[len(longPackageNameParts)-1]
-		services, structs, err := gotsrpc.Read(goPath, longPackageName, args[1:])
+		services, structs, err := gotsrpc.Read(goPath, longPackageName, target.Services)
 
 		if err != nil {
 			fmt.Fprintln(os.Stderr, "an error occured while trying to understand your code", err)
 			os.Exit(2)
 		}
-		jsonDump(structs)
-		ts, err := gotsrpc.RenderTypeScript(services, structs, conf)
+		ts, err := gotsrpc.RenderTypeScript(services, structs, target.TypeScriptModule)
 		if err != nil {
 			fmt.Fprintln(os.Stderr, "could not generate ts code", err)
 			os.Exit(3)
 		}
 
-		fmt.Println(ts)
+		fmt.Println(os.Stdout, ts)
 
 		gocode, goerr := gotsrpc.RenderGo(services, packageName)
 		if goerr != nil {
@@ -105,7 +109,6 @@ func main() {
 			fmt.Fprintln(os.Stderr, "could not write go source to file", writeErr)
 			os.Exit(5)
 		}
-		//fmt.Println(goFilename, gocode)
-		//gotsrpc.ReadFile("/Users/jan/go/src/github.com/foomo/gotsrpc/demo/demo.go", []string{"Service"})
-	*/
+	}
+
 }
diff --git a/config/config.go b/config/config.go
index 0c44858..f1475a3 100644
--- a/config/config.go
+++ b/config/config.go
@@ -7,9 +7,10 @@ import (
 )
 
 type Target struct {
-	Name     string
-	Package  string
-	Services []string
+	Package          string
+	Services         []string
+	TypeScriptModule string `yaml:"module"`
+	Out              string
 }
 
 type Mapping struct {
diff --git a/config/config_test.go b/config/config_test.go
index 1586c6f..c07d58e 100644
--- a/config/config_test.go
+++ b/config/config_test.go
@@ -5,8 +5,11 @@ import "testing"
 const sampleConf = `---
 targets:
   demo:
+    services:
+      - Service
     package: github.com/foomo/gotsrpc/demo
-    out: /tmp/test.ts 
+    module: My.Service
+    out: /tmp/my-service.ts 
 mappings:
   foo/bar:
     module: Sample.Module
@@ -34,4 +37,26 @@ func TestLoadConfig(t *testing.T) {
 	if foo.Out != "path/to/ts" || foo.TypeScriptModule != "Sample.Module" {
 		t.Fatal("unexpected data", foo)
 	}
+
+	// looking at the targets
+
+	demoTarget, ok := c.Targets["demo"]
+	if !ok {
+		t.Fatal("demo target not found")
+	}
+	if demoTarget.Out != "/tmp/my-service.ts" {
+		t.Fatal("demo target out is wrong")
+	}
+	if demoTarget.Package != "github.com/foomo/gotsrpc/demo" {
+		t.Fatal("wrong target package")
+	}
+	if demoTarget.TypeScriptModule != "My.Service" {
+		t.Fatal("wromg ts module")
+	}
+	if len(demoTarget.Services) != 1 {
+		t.Fatal("wrong number of services")
+	}
+	if demoTarget.Services[0] != "Service" {
+		t.Fatal("first serive is wrong")
+	}
 }